A.) The amount of money the company should spend on advertising in order to obtain a maximum profit.

B.) The maximum Profit.

I am stuck on this problem and I have to have it submitted soon. Can anyone help me????!?!?!?

find the derivative of w/r to , then set and solve for the critical values of ... finally, determine which (if any) of those critical values yields a maximum for by using the first or second derivative test for extrema.